The INSIDER Summary:

In one photo, she was relaxed; in the other, she was flexing and posing.

Puhto's post reminds her followers that photos posted on the app are usually heavily edited, posed, or unnatural.

Sara Puhto has posted everything from vegan meals to armpit hair on her Instagram account.

The 20-year-old Finnish blogger, who has over 156,000 Instagram followers, also loves posting side-by-side photos of her posed and unposed body to show the difference that it can make.

Recently, Puhto demonstrated this again with two photos taken at the beach, which we first spotted on Yahoo! In the photo on the left, she has a more natural, relaxed pose; in the photo on the right, she appears to be flexing.

"I still sometimes get a slight pang of sadness and jealousy when I see all the big beautiful bums on instagram and wish I could magically have what they have," Puhto wrote in the caption. "Because sometimes I feel like all my booty gains are gone when I take photos where it looks smaller, but then I remember that I shouldn't compare my body to theirs."

She pointed out that, when it comes to getting the perfect photo, "it's all about posing/angles." She added that "nobody looks [the way they do on Instagram] all the time."

The blogger also argued that there is nothing wrong with posting a good photo of yourself, but that you should always take Instagram photos with a grain of salt. "Just remember that when you're scrolling through social media and see all the posed bums that you too have a great bum and that nobody looks like that 24/7," she wrote.

Puhto ended her post with this note of encouragement: "Be comfortable in your own skin no matter what angle, posed or unposed, and you'll radiate beauty!"

The post has received over 10,000 likes and tons of comments from people inspired by Puhto's honesty.

"I just wanted to thank you, I have such a hard time with accepting myself and thanks to your posts I feel much better about my body image, keep up what you're doing because you're amazing," one user wrote.

Another commenter described how she could relate to Puhto's feelings about perfection on Instagram. "It's way too stressful tryin' to remake or BE like 'those' girls- because even THOSE girls have imperfections."